CN111891936A - Hoisting device for offshore wind turbine maintenance - Google Patents

Abstract

The present disclosure provides a lifting device for maintenance of an offshore wind turbine, belonging to the technical field of marine machinery and equipment. The hoisting device is connected to the tower of the offshore wind turbine through the tower connection assembly on the tower connection base. Each rotating leg in the rotating gantry includes a coplanar first rotating rod, a second rotating rod and a fan-shaped support, the second rotating rod is provided with a first pulley, and the fan-shaped support is installed on the first rotating rod and has two phase supports. adjacent limit pulley. The wire rope of the hoisting winch bypasses one of the two limit pulleys and then the first pulley, and the fan-shaped support can share the force that the rotating gantry needs to bear. The gear on the second rotating rod meshes and rotates with the arc-shaped rack in the fan-shaped support, and cooperates with the telescopic cylinder that drives the first rotating rod, the center of gravity of the rotating gantry and the second end of the second rotating rod can be located at different positions. The lifting of gearboxes and blades at different positions in the nacelle of the offshore wind turbine has a simple structure and requires low maintenance costs.

Description

Lifting devices for offshore wind turbine maintenance

technical field

The present disclosure relates to the technical field of marine machinery and equipment, and in particular, to a lifting device used for maintenance of offshore wind turbines.

Background technique

Offshore wind turbines, also known as offshore wind turbines, are power machines that convert wind energy into mechanical work, and are also a relatively common power generation device. The offshore wind turbine includes at least a tower, a nacelle and a blade rotor. A nacelle is arranged on the top of the tower. The nacelle is equipped with a drive-connected generator and a gearbox, and the output shaft of the gearbox is connected to the blades.

Offshore generators are usually installed on the ocean. The blades and gearboxes in offshore wind generators are prone to failure due to external factors. Regular maintenance of blades and gearboxes in offshore wind generators is required. When maintaining the blades and gearboxes in offshore wind turbines, it is often necessary to mobilize large ships such as wind power installation ships, and use cranes on large ships such as wind power installation ships to remove the blades and gearboxes in the wind turbines. After repair or replacement, the blades and gearboxes are lifted to the top of the tower by a crane for installation. However, each time an offshore wind turbine is repaired or replaced, a large vessel such as a wind power installation vessel is required, resulting in high costs for regular maintenance of the blades and gearboxes in the offshore wind turbine.

SUMMARY OF THE INVENTION

The embodiments of the present disclosure provide a lifting device for maintenance of offshore wind turbines, which can reduce the cost required for regular maintenance of blades and gearboxes in offshore wind turbines. The technical solution is as follows:

An embodiment of the present disclosure provides a lifting device for maintenance of an offshore wind turbine. The lifting device includes a tower connection base, a rotating gantry, a hoisting winch and a drive assembly, and the tower connection base includes a tower connection base provided on the The tower connection assembly on the tower connection base,

The rotating gantry includes a beam, two parallel opposite rotating legs, the first pulley and two fan-shaped supports, two ends of the beam are respectively connected with the two rotating legs, and each rotating leg is It includes a coplanar first rotating rod and a second rotating rod, the first end of the first rotating rod is hinged with the tower connection base, and the second end of the first rotating rod is connected with the second rotating rod The first end of the second rotating rod is hinged, the second end of the second rotating rod is fixed with one end of the beam, the first pulley is arranged on the second end of the second rotating rod,

The two fan-shaped supports are connected to the two rotating legs in a one-to-one correspondence, and the plane where the fan-shaped supports are located is parallel to the plane where the rotating legs are located. A support rod, an arc-shaped rack and two limit pulleys, the first support rod, the second support rod and the arc-shaped rack are connected end to end in a fan-shaped frame shape, and the first support rod of the first support rod is in the shape of a fan-shaped frame. The end is connected to the first end of the second support rod, and the first end of the first support rod and the first end of the second support rod are both connected to the first rotating rod, and the first end of the first support rod is connected to the first rotating rod. The two rotating rods are provided with a first driving member and a gear meshing with the arc-shaped rack. The first driving member is used to drive the gear to rotate, and the two limit pulleys are adjacently arranged on the arc-shaped rack. On the rack, the axes of the two limit pulleys are parallel to each other, the axes of the limit pulleys are perpendicular to the plane where the rotating legs are located, the lifting winch is arranged on the tower connection base, the lifting The wire rope of the winch goes around one of the two limit pulleys and then goes around the first pulley, and the drive assembly is used to drive the first rotation rod to rotate.

Optionally, the drive assembly includes a telescopic cylinder, one end of the telescopic cylinder is hinged with the tower connection base, and the other end of the telescopic cylinder is hinged with the second end of the second support rod.

Optionally, the fan-shaped support further includes a reinforcement rod, the first end of the reinforcement rod is connected with the arc-shaped rack, and the second end of the reinforcement rod is connected with the second end of the second support rod .

Optionally, the rotating gantry further includes two traction pulleys, the two traction pulleys are both arranged on the second rotating rod, the axes of the two traction pulleys are parallel to each other, and the two traction pulleys are The axis is perpendicular to the axis of the first pulley, the two traction pulleys are located on both sides of the first pulley in the axial direction, and the wire rope of the hoisting winch goes around one of the two limit pulleys. The limit pulley then bypasses one of the two traction pulleys and the first pulley in sequence.

Optionally, the tower connection base includes a first surface and a second surface that are parallel and opposite to each other, the first surface, the rotating gantry and the driving assembly are all disposed on the first surface, The hoisting winch is disposed on the second surface.

Optionally, the hoisting device further includes a support pulley set, the support pulley set includes a first support pulley and a second support pulley that are rolled on the first surface, the axis of the first support pulley and the The axes of the second support pulleys are all parallel to the axes of the first pulleys, the end face of the first support pulley and the end face of the second support pulley are in the same plane, and the first support pulley and the first support pulley are in the same plane. Two support pulleys are located on both sides of the telescopic cylinder. The first support pulley and the second support pulley are used for the wire rope to pass around and then go around one of the two limit pulleys. the limit pulley.

Optionally, the hoisting device includes two hoisting winches, the wire rope of one hoisting winch goes around the first pulley on one of the rotating legs, and the wire rope of the other hoisting winch goes around the other. one of said first pulleys on said pivoting legs.

Optionally, the hoisting device further includes an intermediate hoisting assembly, the intermediate hoisting assembly includes a lifting plate and a hook, the lifting plate is located between the beam and the two rotating legs, and the hoisting The hook is fixedly connected with the lifting plate, the wire rope of one hoisting winch goes around the first pulley on one of the rotating legs, and the wire rope of the other hoisting winch goes around all the wires on the other rotating leg. The first pulleys are connected, and the wire ropes of the two hoisting winches are both arranged on the hoisting plate.

Optionally, the intermediate lifting assembly further includes a first intermediate pulley, a second intermediate pulley, a third intermediate pulley, a first movable pulley and a second movable pulley whose axes are parallel to each other. The first intermediate pulley, the second intermediate pulley and the third intermediate pulley are arranged on the beam at intervals, the axis of the first intermediate pulley is perpendicular to the axis of the first pulley, the first intermediate pulley The movable pulley and the second movable pulley are arranged on the lifting plate at intervals,

After the wire rope of one hoisting winch goes around the first pulley on one of the rotating legs, it goes around the first intermediate pulley, the first movable pulley and the second intermediate pulley in turn, and the other hoisting winch After the steel wire rope bypasses the first pulley on the other rotating leg, it bypasses the third intermediate pulley, the second movable pulley and the second intermediate pulley in sequence, and the wire ropes of the two hoisting winches are end connected.

Optionally, the tower connection assembly includes an annular tube, a plurality of pressing blocks and a plurality of second driving members corresponding to the plurality of pressing blocks, and the annular tube is used for coaxially sleeved on the On the tower, the annular cylinder is fixedly connected with the tower connection base, the annular cylinder is provided with a plurality of installation holes in the circumferential direction, and the plurality of pressing blocks are arranged in the plurality of installation holes in a one-to-one correspondence. Inside, the plurality of second driving members are arranged on the annular cylinder, and the plurality of second driving members are connected with the plurality of pressing blocks in one-to-one correspondence, and each second driving member is used for The corresponding pressing blocks are driven to move in the radial direction of the annular barrel.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure include at least:

The hoisting device includes a tower connection base, a rotating gantry, a hoisting winch and a drive assembly, and a tower connection assembly is arranged on the tower connection base. The hoisting device can be connected to the tower of the offshore wind turbine through the tower connection assembly on the tower connection base. In the rotating gantry, the two ends of the beam are respectively connected with two rotating legs, and the rotating legs include a coplanar first rotating rod and a second rotating rod, the first end of the first rotating rod is hinged with the tower connection base, and the first rotating rod The second end of a rotating rod is hinged with the first end of the second rotating rod, the second end of the second rotating rod is fixed with one end of the beam, and the first pulley is arranged on the second end of the second rotating rod. A fan-shaped support is arranged on the rotating leg, and the fan-shaped support includes a first support rod, a second support rod, an arc-shaped rack and two limit pulleys, and the first support rod and the second support rod are connected with the arc-shaped rack end-to-end In the shape of a fan-shaped frame, the first end of the first support rod is connected to the first end of the second support rod, and the first end of the first support rod and the first end of the second support rod are both connected to the first rotating rod , the second rotating rod has a first driving member and a gear that mesh with the arc-shaped rack, the first driving member is used to drive the gear to rotate, two limit pulleys are adjacently arranged on the arc-shaped rack, and the two limit pulleys are The axes of the position pulleys are parallel to each other, and the axes of the limit pulleys are perpendicular to the plane where the rotating legs are located. The wire rope of the hoisting winch arranged on the tower connection base can bypass one of the two limit pulleys and then the first pulley, and the fan-shaped support can strengthen the support strength of the rotating gantry, and the two A limit pulley can prevent the wire rope from falling off the rope and cause safety problems. The first driving member on the second rotating rod can drive the gear to rotate, so that the second rotating rod can rotate around the center of the arc-shaped rack. While the fan-shaped support provides support for the second rotating rod, the second rotating rod can be relatively The rotating rod rotates, and in conjunction with the drive assembly that drives the first rotating rod to rotate, the wire rope on the first pulley at the second end of the second rotating rod can also be rotated to different positions, and the overall center of gravity of the rotating gantry can be adjusted to adjust the position of the gantry. Gear boxes and blades in different positions are lifted, and the rotating gantry will not be damaged by excessive force. The overall structure is simple and can be directly installed on the tower. At the same time, the gearbox and blades at different positions in the nacelle of the offshore wind turbine can be lifted. Compared with each maintenance or replacement of the offshore wind turbine, a wind power is required. Installation on a large vessel such as a boat requires low maintenance costs.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a lifting device for maintenance of an offshore wind turbine provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a use state of the lifting device provided by the embodiment of the present disclosure;

3 is a schematic structural diagram of a first driving member provided by an embodiment of the present disclosure;

4 is a front view of a lifting device provided by an embodiment of the present disclosure;

5 is a simplified schematic diagram of a wire rope winding state provided by an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a tower connection assembly provided by an embodiment of the present disclosure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a lifting device for maintenance of an offshore wind turbine provided by an embodiment of the present disclosure. Referring to FIG. 1 , an embodiment of the present disclosure provides a lifting device for maintenance of an offshore wind turbine. The lifting device includes a tower connection base 1 , a rotating gantry 2 , a hoisting winch 3 and a drive assembly 4 , and the tower is connected The base 1 includes a tower connection assembly 11 arranged on the tower connection base 1 .

The rotating gantry 2 includes a beam 21, two parallel opposite rotating legs 22, a first pulley 23 and two fan-shaped supports 24. Both ends of the beam 21 are respectively connected with the two rotating legs 22, and each rotating leg 22 includes a total of The first rotating rod 221 and the second rotating rod 222 on the surface are hinged with the first end of the first rotating rod 221 and the tower connection base 1 , and the second end of the first rotating rod 221 and the first end of the second rotating rod 222 In hinged connection, the second end of the second rotating rod 222 is fixed with one end of the beam 21 , and the first pulley 23 is arranged on the second end of the second rotating rod 222 .

The two fan-shaped supports 24 are connected to the two rotating legs 22 in one-to-one correspondence, and the plane where the fan-shaped supports 24 are located is parallel to the plane where the rotating legs 22 are located. The arc-shaped rack 243 and two limit pulleys 244, the first support rod 241, the second support rod 242 and the arc-shaped rack 243 are connected end to end in a fan-shaped frame shape, the first end of the first support rod 241 and the second support The first end of the rod 242 is connected, and the first end of the first support rod 241 and the first end of the second support rod 242 are both connected to the first rotating rod 221, and the second rotating rod 222 has a first driving member 224. and the gear 223 meshing with the arc-shaped rack 243, the first driving member 224 is used to drive the gear 223 to rotate, the two limit pulleys 244 are adjacently arranged on the arc-shaped rack 243, the axes of the two limit pulleys 244 Parallel to each other, the axis of the limit pulley 244 is perpendicular to the plane of the rotating leg 22, the hoisting winch 3 is arranged on the tower connection base 1, and the wire rope 31 of the hoisting winch 3 bypasses one limit pulley 244 of the two limit pulleys 244 After passing around the first pulley 23 , the driving assembly 4 is used to drive the first rotating rod 221 to rotate.

The lifting device includes a tower connection base 1 , a rotating gantry 2 , a hoisting winch 3 and a drive assembly 4 , and a tower connection assembly 11 is provided on the tower connection base 1 . The hoisting device can be connected to the tower 100 of the offshore wind turbine through the tower connection assembly 11 on the tower connection base 1 . In the rotating gantry 2, the two ends of the beam 21 are respectively connected with the two rotating legs 22. The rotating legs 22 all include a coplanar first rotating rod 221 and a second rotating rod 222. The first end of the first rotating rod 221 is connected to the The tower connection base 1 is hinged, the second end of the first rotating rod 221 is hinged with the first end of the second rotating rod 222, the second end of the second rotating rod 222 is fixed with one end of the beam 21, and the first pulley 23 is arranged on the The second end of the second rotating rod 222 . The rotating leg 22 is provided with a fan-shaped support 24, and the fan-shaped support 24 includes a first support rod 241, a second support rod 242, an arc-shaped rack 243 and two limit pulleys 244. The first support rod 241 and the second support rod The rod 242 and the arc-shaped rack 243 are connected end to end in a fan-shaped frame shape, the first end of the first support rod 241 is connected with the first end of the second support rod 242, and the first end of the first support rod 241 is connected with the second support rod The first ends of the rods 242 are all connected to the first rotating rod 221 . The second rotating rod 222 has a first driving member 224 and a gear 223 that engage with the arc-shaped rack 243 . The first driving member 224 is used to drive the gear 223 During rotation, two limit pulleys 244 are adjacently arranged on the arc-shaped rack 243 , the axes of the two limit pulleys 244 are parallel to each other, and the axis of the limit pulleys 244 is perpendicular to the plane where the rotating leg 22 is located. The wire rope 31 of the hoisting winch 3 arranged on the tower connection base 1 can bypass one of the two limit pulleys 244 and then bypass the first pulley 23. The fan-shaped support 24 can strengthen the support of the rotating gantry 2 In addition, the two limit pulleys 244 on the fan-shaped support 24 can prevent the wire rope 31 from falling off the rope and cause safety problems. The first driving member 224 on the second rotating rod 222 can drive the gear 223 to rotate, so that the second rotating rod 222 can rotate around the center of the arc-shaped rack 243. While the fan-shaped support 24 provides support for the second rotating rod 222, the first The two rotating rods 222 can rotate relative to the first rotating rod 221. In cooperation with the driving assembly 4 that drives the first rotating rod 221 to rotate, the wire rope 31 on the first pulley 23 at the second end of the second rotating rod 222 can also be rotated to different position, adjust the overall center of gravity of the rotating gantry 2 to lift the gear box 400 and the blades 300 at different positions of the nacelle 200, and the rotating gantry 2 will not be damaged by excessive force. The overall structure is simple, and can be directly installed on the tower 100. At the same time, the gear box 400 and the blades 300 in different positions in the nacelle 200 of the offshore wind turbine can be lifted. Large ships such as primary wind power installation ships are required, and the maintenance costs required are low.

In addition, when the lifting device in the present disclosure lifts the blades 300 and the gear box 400 , it only needs to adjust the rotation amplitude of the rotating gantry 2 , so that the blades 300 and the gear box 400 in different positions of the nacelle 200 can be lifted. Make steady improvements. The telescopic cylinder 41 and the fan-shaped support 23 respectively support the first rotating rod 221 and the second rotating rod 222 , which can also make the process of lifting the blade 300 and the gear box 400 more stable for the rotating gantry 2 . Compared with the traditional method, when using the crane on the wind power installation vessel for lifting, it is necessary to control the whole crane to adjust the boom position twice to lift the gearbox 400 and the blades 300, and the maintenance cost is also lower.

1 , the drive assembly 4 may include a telescopic cylinder 41 , one end of which is hinged with the tower connection base 1 , and the other end of the telescopic cylinder 41 is hinged with the second end of the second support rod 242 .

One end of the telescopic cylinder 41 is hinged with the tower connection base 1, and the other end of the telescopic cylinder 41 is hinged with the second end of the second support rod 242. The telescopic cylinder 41 can drive the first support rod 242 by driving the second support rod 242 in the fan-shaped support 24 When the rotating rod 221 rotates, the force on the rotating gantry 2 can be shared with the telescopic rod 41, the fan-shaped support 24 and the first rotating rod 221. The possibility of damage to the rotating gantry 2 is small, and the volume can be reduced as much as possible. In this case, the bearing capacity of the rotating gantry 2 is improved, and the manufacturing cost is reduced.

Referring to FIG. 1 , there is an included angle α between the first support rod 241 and the second support rod 242 , and the first rotation rod 221 may be located on the bisector of the included angle α.

When the first rotating rod 221 can be located on the bisector of the included angle α, the fan-shaped support 24 can effectively support the first rotating rod 221 .

Optionally, the fan-shaped support 24 may further include a reinforcement rod 245 , the first end of the reinforcement rod 245 is connected with the arc-shaped rack 243 , and the second end of the reinforcement rod 245 is connected with the second end of the second support rod 242 .

The reinforcement rod 245 can strengthen the strength of the fan-shaped support 24, and the second end of the reinforcement rod 245 is connected with the second end of the second support rod 242, and can also share the force transmitted from the telescopic cylinder 41 to the fan-shaped support 24, ensuring that Stable use of sector support 24.

1, the fan-shaped support 24 may further include a mounting block 246, the mounting block 246 is fixed on the arc-shaped rack 243, the two limit pulleys 244 can be set on the mounting block 246, and the first end of the reinforcing rod 245 is also Attachable to mounting block 246 .

The two limit pulleys 244 can be arranged on the mounting block 246, and the first end of the reinforcing rod 245 can also be connected with the mounting block 246, which can ensure the use strength of the arc-shaped rack 243 and reduce the gear 223 and the arc-shaped rack 243. During meshing, the deflection of the arc-shaped rack 243 leads to the problem of jamming, which ensures the stable support and use of the fan-shaped support 24 .

Optionally, the fan-shaped support 24 can be made of Q690 high-strength structural steel. The overall strength of the fan-shaped support 24 is good, and can bear a large load.

Referring to FIG. 1 , the rotating gantry 2 further includes two traction pulleys 25 . Both traction pulleys 25 are arranged on the second rotating rod 222 . The axes of the two traction pulleys 25 are parallel to each other, and the axes of the two traction pulleys 25 are parallel to each other. Perpendicular to the axis of the first pulley 23, the two traction pulleys 25 are located on both sides of the first pulley 23 in the axial direction, and the wire rope 31 of the hoisting winch 3 bypasses one of the two limit pulleys 244 and then turns One of the two traction pulleys 25 and the first pulley 23 are bypassed.

The arrangement of the two traction pulleys 25 can reduce the possibility of the wire rope 31 falling off the first pulley 23, and when the hoisting device lifts the gearbox 400 and the blades 300, the role that the telescopic cylinder 41 needs to undertake is minimized force.

FIG. 2 is a schematic diagram of a use state of the lifting device provided by the embodiment of the present disclosure. Combining with FIG. 1 and FIG. 2 , FIG. 1 and FIG. 2 show two different states of the lifting device. The lifting device shown in FIG. 1 The hoisting device is in a state of hoisting the gearbox 400 , and the hoisting device shown in FIG. 2 is in a state of hoisting the blade 300 . In FIGS. 1 and 2 , the steel wire rope 31 is respectively wound around one of the two limit pulleys 244 , and the steel wire rope 31 is not easy to come off the rope. In addition, the wire rope 31 is respectively wound on one of the two traction pulleys 25 in FIG. 1 and FIG. 2 , and the wire rope 31 is not easy to come off the rope.

FIG. 3 is a schematic diagram of a use state of the lifting device provided by the embodiment of the present disclosure. Referring to FIG. 3 , the first driving member 224 is disposed on the second rotating rod 222 , and the first driving member 224 drives the arc-shaped rack 243 The meshed gear 223 rotates.

Optionally, a mounting bracket 225 is provided on the second rotating rod 222, and the mounting bracket 225 includes a connecting plate 2251 and two parallel opposite support plates 2252, the two support plates 2252 are perpendicular to the connecting plate 2251 and are arranged at intervals on the connecting plate 2251 and one end of the connecting plate 2251 is fixedly connected with the second rotating rod 222 . The first drive member 224 is fixedly connected to one support plate 2252, the output shaft 2241 of the first drive member 224 is rotatably supported on the other support plate 2252, the gear 223 is sleeved on the output shaft 2241, and the gear 223 is located on two between the support plates 2252.

The arrangement of the mounting bracket 225 can facilitate the connection of the first driving member 224 and the gear 223 to the second rotating rod 222 , and can also effectively support the gear 223 and the first driving member 224 .

Referring to FIG. 1 , the tower connection base 1 may include a first surface 1a and a second surface 1b that are parallel and opposite to each other. The winch 3 is provided on the second surface 1b.

The tower connection base 1 is arranged to include a first surface 1a and a second surface 1b that are parallel and opposite to each other, the rotating gantry 2 and the drive assembly 4 are arranged on the first surface 1a, and the hoisting winch 3 is arranged on the second surface 1b On the other hand, the installation space required by the whole lifting device can be reduced, the manufacturing cost of the lifting device can also be reduced, and the center of gravity of the whole lifting device can be concentrated, which is convenient for the installation of the whole lifting device. And when the wire rope 31 of the hoisting winch 3 is wound on the rotating gantry 2, the wire rope 31 will be in contact with the edge of the tower connection base 1, and the tower connection base 1 will bear part of the force from the wire rope 31, sharing part of the rotating gantry. 2 will bear the force from the wire rope 31 to ensure the stable work of the rotating gantry 2.

Referring to FIG. 1, it can be seen that the lifting device further includes a support pulley block 5, and the support pulley block 5 includes a first support pulley 51 and a second support pulley 52 that are rolled on the first surface 1a, and the axis of the first support pulley 51 and the second support pulley 51. The axis of the pulley 52 is parallel to the axis of the first pulley 23 , the end face of the first support pulley 51 and the end face of the second support pulley 52 are in the same plane, and the first support pulley 51 and the second support pulley 52 are located in the drive assembly 4 . The first support pulley 51 and the second support pulley 52 are used to bypass one of the two limit pulleys 244 after the wire rope 31 is bypassed.

The end face of the first support pulley 51 and the end face of the second support pulley 52 are in the same plane. The first support pulley 51 and the second support pulley 52 are used for the wire rope 31 to go around, and then go around the first pulley 24. The first support pulley 51 and the second support pulley 52 can share the force on the wire rope 31 to reduce the risk of the wire rope 31 being broken due to excessive load. The first support pulley 51 and the second support pulley 52 are located on both sides of the drive assembly 4, and can also share the force that the rotating gantry 2 bears, reduce the force that the drive assembly 4 supporting the rotating gantry 2 needs to bear, and ensure that Stable operation of the rotating gantry 2 and the drive assembly 4.

Exemplarily, through holes may also be provided on the tower connection base 1 . The wire rope 31 can pass through the through hole on the sleeve connection base to avoid friction between the wire rope 31 and the tower connection base 1 .

FIG. 4 is a front view of a lifting device provided by an embodiment of the present disclosure. Referring to FIG. 4 , the lifting device may include two hoisting winches 3 , and the wire rope 31 of one hoisting winch 3 goes around the first pulley on one rotating leg 22 24. The wire rope 31 of the other hoisting winch 3 goes around the first pulley 24 on the other rotating leg 22.

Two hoisting winches 3 can be arranged on both sides of the rotating gantry 2 respectively, and the two hoisting winches 3 lift the blade 300 or the gearbox 400 together, which can ensure the stable lifting of the blade 300 and the gearbox 400, and improve the blade 300 and the gearbox 400. Increased efficiency of gearbox 400.

Referring to FIG. 4 , the hoisting device may further include an intermediate hoisting assembly 6 . The intermediate hoisting assembly 6 includes a lifting plate 61 and a hook 62 . The lifting plate 61 is located between the beam 21 and the two rotating legs 22 . The lift plates 61 are fixedly connected, the wire rope 31 of one hoisting winch 3 goes around the first pulley 23 on one rotating leg 22, and the wire rope 31 of the other hoisting winch 3 goes around the first pulley 23 on the other rotating leg 22 to connect, and The wire ropes 31 of the two hoisting winches 3 are both arranged on the lifting plate 61 .

The intermediate lifting assembly 6 includes a lifting plate 61 and a hook 62 . The two lifting winches 3 jointly lift the lifting plate 61 and the hook 62 connected to the lifting plate 61 , which can facilitate the stable lifting of the gearbox 400 and the blade 300 .

4 , the intermediate lifting assembly 6 further includes a first intermediate pulley 63 , a second intermediate pulley 64 , a third intermediate pulley 65 , a first movable pulley 66 and a second movable pulley 67 whose axes are parallel to each other. The first intermediate pulley 63 , the second intermediate pulley 64 and the third intermediate pulley 65 are arranged on the beam 21 at intervals. The axis of the first intermediate pulley 63 is perpendicular to the axis of the first pulley 24 , and the first movable pulley 66 is spaced from the second movable pulley 67 . provided on the lift plate 61 . After the wire rope 31 of one hoisting winch 3 goes around the first pulley 23 on one rotating leg 22, it goes around the first intermediate pulley 63, the first movable pulley 66 and the second intermediate pulley 64 in turn, and the wire rope 31 of the other hoisting winch 3 goes around the first intermediate pulley 63, the first movable pulley 66 and the second intermediate pulley 64 in turn After passing the first pulley 23 on the other rotating leg 22 , the third intermediate pulley 65 , the second movable pulley 67 and the second intermediate pulley 64 are successively bypassed, and the ends of the wire ropes 31 of the two hoisting winches 3 are connected.

The middle hoisting assembly 6 adopts the above setting. When the two hoisting winches 3 are working, the first movable pulley 66 and the second movable pulley 67 on the lifting plate 61 and the first middle pulley 63, the second middle pulley 64 on the beam 21, Between the third intermediate pulleys 65 is a 4-fold pulley, which saves effort when the hoisting winch 3 pulls the wire rope 31 to lift the blade 300 or the gear box 400 , which can reduce the burden of the hoisting winch 3 .

Optionally, a mounting plate 68 is detachably connected to the beam 21 , and the first intermediate pulley 63 , the second intermediate pulley 64 and the third intermediate pulley 65 can all be disposed on the mounting plate 68 . This facilitates the installation and winding of the first intermediate pulley 63 , the second intermediate pulley 64 and the third intermediate pulley 65 .

Exemplarily, the first intermediate pulley 63 , the third intermediate pulley 65 , the first movable pulley 66 and the second movable pulley 67 may be distributed around the second intermediate pulley 64 . The winding of the wire rope 31 is facilitated.

Referring to FIG. 4 , it can be known that the wire rope 31 of the hoisting winch 3 can be wound around the intermediate hoisting assembly 6 after bypassing the traction sheave 25 .

The traction pulley 25 can guide the wire rope 31 to ensure that the wire rope 31 can smoothly enter the intermediate lifting assembly 6 after bypassing, so as to ensure the stable lifting of the blade 300 and the gear box 400 .

5 is a simplified schematic diagram of the winding state of the wire rope provided by the embodiment of the present disclosure. Referring to FIG. 5 , it can be seen that the wire rope 31 of a hoisting winch 3 can bypass one of the two limit pulleys 244 and the first pulley 23 , and finally go around the first intermediate pulley 63, the first movable pulley 66 and the second intermediate pulley 64, and the wire rope 31 of the other lifting winch 3 can bypass one of the two limit pulleys 244, the first pulley 23, and finally go around to the third intermediate pulley 65, the second movable pulley 67 and the second intermediate pulley 64.

FIG. 6 is a schematic structural diagram of a tower connection assembly provided by an embodiment of the present disclosure. Referring to FIG. 6 , the tower connection assembly 11 may include an annular cylinder 111 , a plurality of pressing blocks 112 , and a one-to-one correspondence with the plurality of pressing blocks 112 There are a plurality of second driving members 113, the annular tube 111 is used for coaxially sleeved on the tower tube 100, the annular tube 111 is provided with a plurality of installation holes 111a in the circumferential direction, and the plurality of pressing blocks 112 are arranged in a one-to-one correspondence. In the mounting holes 111a, a plurality of second driving members 113 are disposed on the annular cylinder 111, and the plurality of second driving members 113 are connected to the plurality of pressing blocks 112 in a one-to-one correspondence, and each second driving member 113 is used for driving The corresponding pressing blocks 112 move in the radial direction of the annular barrel 111 .

The tower connection assembly 11 adopts the above structure, and the pressing block 112 in the mounting hole 111a can be driven by the second driving member 113, and the radial movement of the annular cylinder 111 can compress the outer wall of the tower cylinder 100, and the annular cylinder 111 can be fixed in the mounting hole 111a. On the tower 100, the tower connection base 1 is also fixed on the tower 100. After the tower connection base 1 is fixed, the gantry 2 and the lifting winch 3 can be rotated to work. It is convenient to fix the hoisting device and the tower drum 100 .

Optionally, the tower connection base 1 may be fixed on one end of the annular cylinder 111 , and the first surface 1 a of the tower connection base 1 may be parallel to the end face of the annular cylinder 111 . At this time, the annular cylinder 111 can also support the tower connection base 1 to ensure the stable use of the lifting device.

The second driving member 113 may be a jack or a telescopic cylinder, which is not limited in the present disclosure.

Optionally, a rubber layer may be provided on the surface of the pressing block 112 . The frictional force between the pressing block 112 and the outer wall of the tower tube 100 can be increased to avoid abnormal movement of the annular tube 111 .

Illustratively, the annular barrel 111 may include two detachably connected half annular plates 1111 . It is convenient to disassemble and assemble the tower connection assembly 11 .

It should be noted that the tower connection base 1 can be connected to a semi-annular plate 1111 . Easy to disassemble.

Optionally, both the first driving member 224 and the second driving member 113 in the present disclosure can be motors or motors. Easy to implement. This disclosure does not limit this.

The above is not intended to limit the present invention in any form. Although the present invention has been disclosed as above through the embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can The technical contents disclosed above are used to make some changes or modifications to equivalent embodiments with equivalent changes, but any simple modifications and equivalent changes made to the above embodiments according to the technical essence of the present invention are not departing from the content of the technical solution of the present invention. and modification, all still belong to the scope of the technical solution of the present invention.

Claims (10)

1. A hoisting device for offshore wind turbine maintenance is characterized by comprising a tower drum connecting base (1), a rotating gantry (2), a lifting winch (3) and a driving assembly (4), wherein the tower drum connecting base (1) comprises a tower drum connecting assembly (11) arranged on the tower drum connecting base (1),

rotate portal (2) and include crossbeam (21), two parallel relative rotation leg (22), first pulley (23) and two fan-shaped supports (24), the both ends of crossbeam (21) respectively with two rotation leg (22) are connected, every rotation leg (22) all include coplanar first dwang (221), second dwang (222), the first end of first dwang (221) with the base (1) is connected to the tower section of thick bamboo is articulated, the second end of first dwang (221) with the first end of second dwang (222) is articulated, the second end of second dwang (222) is fixed with the one end of crossbeam (21), first pulley (23) set up the second end of second dwang (222),

the two fan-shaped supports (24) are correspondingly connected to the two rotating legs (22) one by one, the plane where the fan-shaped supports (24) are located is parallel to the plane where the rotating legs (22) are located, each fan-shaped support (24) comprises a first support rod (241), a second support rod (242), an arc-shaped rack (243) and two limiting pulleys (244), the first support rod (241), the second support rod (242) and the arc-shaped rack (243) are connected end to form a fan-shaped frame, the first end of the first support rod (241) is connected with the first end of the second support rod (242), the first end of the first support rod (241) and the first end of the second support rod (242) are connected to the first rotating rod (221), the second rotating rod (222) is provided with a first rotating driving piece (242) and a gear (223) meshed with the arc-shaped rack (243), the first driving piece (224) is used for driving the gear (223) to rotate, the two limiting pulleys (244) are adjacently arranged on the arc-shaped rack (243), the axes of the two limiting pulleys (244) are parallel to each other, the axis of the limiting pulley (244) is perpendicular to the plane of the rotating leg (22), the lifting winch (3) is arranged on the tower connecting base (1), a steel wire rope (31) of the lifting winch (3) bypasses one limiting pulley (244) of the two limiting pulleys (244) and then bypasses the first pulley (23), and the driving assembly (4) is used for driving the first rotating rod (221) to rotate.

2. Hoisting device for offshore wind turbine maintenance according to claim 1, wherein the drive assembly (4) comprises a telescopic cylinder (41), one end of the telescopic cylinder (41) being hinged to the tower connection base (1), the other end of the telescopic cylinder (41) being hinged to the second end of the second support bar (242).

3. Hoisting device for offshore wind turbine maintenance, according to claim 2, characterized in that the sector support (24) further comprises a stiffening rod (245), a first end of the stiffening rod (245) being connected with the arc-shaped rack (243), a second end of the stiffening rod (245) being connected with a second end of the second support bar (242).

4. Hoisting device for offshore wind turbine maintenance according to any of claims 1-3, characterized in that the rotating gantry (2) further comprises two traction pulleys (25), both traction pulleys (25) being arranged on the second rotating rod (222), the axes of the two traction pulleys (25) being parallel to each other and the axes of the two traction pulleys (25) being perpendicular to the axis of the first pulley (23), the two traction pulleys (25) being located on both sides of the first pulley (23) in the axial direction, the wire rope (31) of the hoisting winch (3) passing around one of the two limiting pulleys (244) and then passing around one of the two traction pulleys (25) and the first pulley (23) in turn.

5. Lifting device for offshore wind turbine maintenance, according to any of the claims 1 to 3, characterized in that the tower connection foundation (1) comprises a first surface (1a) and a second surface (1b) parallel and opposite to each other, the first surface (1a), the rotating gantry (2) and the drive assembly (4) being arranged on the first surface (1a), the hoisting winch (3) being arranged on the second surface (1 b).

6. Hoisting device for offshore wind turbine maintenance according to claim 5, characterized in that the hoisting device further comprises a support pulley block (5), the support pulley block (5) comprises a first support pulley (51) and a second support pulley (52) arranged rolling on the first surface (1a), the axis of the first support pulley (51) and the axis of the second support pulley (52) are both parallel to the axis of the first pulley (23), the end face of the first support pulley (51) and the end face of the second support pulley (52) are in the same plane, and the first support pulley (51) and the second support pulley (52) are located on both sides of the driving assembly (4), the first support pulley (51) and the second support pulley (52) are used for the steel cable (31) to pass around, and passes around one of the two limiting pulleys (244) of the limiting pulleys (244).

7. Hoisting device for offshore wind turbine maintenance according to any of claims 1-3, characterized in that the hoisting device comprises two hoisting winches (3), the wire rope (31) of one of the hoisting winches (3) being passed around the first pulley (23) on one of the turning legs (22), and the wire rope (31) of the other of the hoisting winches (3) being passed around the first pulley (23) on the other turning leg (22).

8. Hoisting device for offshore wind turbine maintenance according to claim 7, characterized in that the hoisting device further comprises an intermediate hoisting assembly (6), the intermediate hoisting assembly (6) comprising a hoisting plate (61) and a hook (62), the hoisting plate (61) being located between the cross beam (21) and the two turning legs (22), the hook (62) being fixedly connected to the hoisting plate (61), the wire rope (31) of one of the hoisting winches (3) being passed around the first sheave (23) on one of the turning legs (22), the wire rope (31) of the other hoisting winch (3) being passed around the first sheave (23) on the other turning leg (22) being connected, and the wire ropes (31) of both hoisting winches (3) being arranged on the hoisting plate (61).

9. Hoisting device for offshore wind turbine maintenance according to claim 8, characterized in that the intermediate hoisting assembly (6) further comprises a first intermediate pulley (63), a second intermediate pulley (64), a third intermediate pulley (65), a first movable pulley (66) and a second movable pulley (67) having axes parallel to each other, the first intermediate pulley (63), the second intermediate pulley (64) and the third intermediate pulley (65) being arranged on the cross beam (21) at intervals, the axis of the first intermediate pulley (63) being perpendicular to the axis of the first pulley (23), the first movable pulley (66) and the second movable pulley (67) being arranged on the lifting plate (61) at intervals,

one wire rope (31) of hoisting winch (3) is walked around one rotate on leg (22) after first pulley (23), walk around in proper order first middle pulley (63), first movable pulley (66) and second middle pulley (64), another wire rope (31) of hoisting winch (3) is walked around another rotate on leg (22) after first pulley (23), walk around in proper order third middle pulley (65), second movable pulley (67) with second middle pulley (64), just the end of wire rope (31) of two hoisting winch (3) links to each other.

10. The hoisting device for offshore wind turbine maintenance according to any one of claims 1 to 3, wherein the tower connecting assembly (11) comprises an annular cylinder (111), a plurality of pressing blocks (112) and a plurality of second driving members (113) corresponding to the pressing blocks (112) one to one, the annular cylinder (111) is used for being coaxially sleeved on the tower drum 100, the annular cylinder (111) is fixedly connected with the tower connecting base (1), a plurality of mounting holes (111a) are formed in the circumferential direction of the annular cylinder (111), the pressing blocks (112) are correspondingly arranged in the mounting holes (111a), the second driving members (113) are arranged on the annular cylinder (111), the second driving members (113) are correspondingly connected with the pressing blocks (112), and each second driving member (113) is used for driving the corresponding pressing block (112) to move along the radial direction of the annular cylinder (111) And (6) moving.

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